{"id":203199,"date":"2025-05-22T12:36:31","date_gmt":"2025-05-22T04:36:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203199\/"},"modified":"2025-05-22T12:36:31","modified_gmt":"2025-05-22T04:36:31","slug":"java-%e4%b8%ad-hashmap-%e5%a6%82%e4%bd%95%e5%ad%98%e5%82%a8%e5%92%8c%e8%8e%b7%e5%8f%96%e6%95%b0%e6%8d%ae%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203199\/","title":{"rendered":"Java \u4e2d HashMap \u5982\u4f55\u5b58\u50a8\u548c\u83b7\u53d6\u6570\u636e\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

Java \u4e2d HashMap \u5982\u4f55\u5b58\u50a8\u548c\u83b7\u53d6\u6570\u636e\uff1f<\/h1>\n

\u6765\u5230\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60\u6587\u7ae0\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300aJava \u4e2d HashMap \u5982\u4f55\u5b58\u50a8\u548c\u83b7\u53d6\u6570\u636e\uff1f\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

<\/p>\n

hashmap<string, object>\u7684\u7406\u89e3<\/strong><\/p>\n

\u8fd9\u6bb5\u4ee3\u7801\u6e90\u4e8e javascript\uff0c\u5728 java \u4e2d\u6709\u4e0d\u5c0f\u7684\u5dee\u5f02\u3002\u8ba9\u6211\u4eec\u9010\u4e00\u89e3\u8bfb\uff1a<\/p>\n

\u9996\u5148\uff0c\u5b9a\u4e49\u4e86\u4e00\u4e2a\u53d8\u91cf somevar\uff0c\u5b83\u7684\u7c7b\u578b\u4e3a <string,object>\u3002<string,object> \u8868\u793a somevar \u5c06\u5b58\u50a8\u4ee5 string \u4e3a\u952e\u3001object \u4e3a\u503c\u7684\u952e\u503c\u5bf9\u3002object \u662f java \u4e2d\u7684\u4e00\u4e2a\u57fa\u7c7b\uff0c\u8868\u793a\u6240\u6709\u5bf9\u8c61\u7c7b\u578b\u3002<\/p>\n

\u56e0\u6b64\uff0c\u53ef\u4ee5\u5c06\u952e\u503c\u5bf9\u5b58\u50a8\u5728 somevar \u4e2d\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

somevar.put(\"hello\", \"world\"); \/\/ \u6dfb\u52a0\u952e\u4e3a \"hello\"\uff0c\u503c\u4e3a \"world\"\nsomevar.put(\"intvalue\", 23); \/\/ \u6dfb\u52a0\u952e\u4e3a \"intvalue\"\uff0c\u503c\u4e3a 23<\/pre>\n
\u8981\u83b7\u53d6\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528 get() \u65b9\u6cd5\uff1a<\/p>\n
string world = (string) somevar.get(\"hello\"); \/\/ \u83b7\u53d6\u952e\u4e3a \"hello\" \u7684\u503c\nint intvalue = (int) somevar.get(\"intvalue\"); \/\/ \u83b7\u53d6\u952e\u4e3a \"intvalue\" \u7684\u503c<\/pre>\n
\u6ce8\u610f\uff0c\u9700\u8981\u5c06\u8fd4\u56de\u503c\u663e\u5f0f\u8f6c\u6362\u4e3a\u7279\u5b9a\u7c7b\u578b\uff0c\u56e0\u4e3a java \u4f7f\u7528\u6cdb\u578b\u64e6\u9664\uff0c\u7f16\u8bd1\u5668\u4f1a\u5c06\u6cdb\u578b\u7c7b\u578b\u4fe1\u606f\u64e6\u9664\u4e3a object\u3002<\/p>\n
\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5982\u679c\u60f3\u8981\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u5b58\u50a8\u7528\u6237\u6570\u636e\uff0c\u53ef\u4ee5\u4f7f\u7528 map<string, object>\uff0c\u5176\u4e2d\u53ef\u4ee5\u5c06\u7528\u6237\u4fe1\u606f\u4f5c\u4e3a\u952e\u503c\u5bf9\u5b58\u50a8\uff0c\u4f8b\u5982\uff1a<\/p>\n
Map<String, Object> userData = new HashMap<>();\nuserData.put(\"name\", \"John Doe\");\nuserData.put(\"email\", \"john.doe@example.com\");\nuserData.put(\"age\", 30);<\/pre>\n
\u8fd9\u6837\uff0c\u5c31\u53ef\u4ee5\u8f7b\u677e\u5730\u8bbf\u95ee\u548c\u7ba1\u7406\u7528\u6237\u6570\u636e\uff0c\u56e0\u4e3a\u5b83\u662f\u4e00\u4e2a\u952e\u503c\u5bf9\u96c6\u5408\u3002<\/p>\n
\u4eca\u5929\u5173\u4e8e\u300aJava \u4e2d HashMap \u5982\u4f55\u5b58\u50a8\u548c\u83b7\u53d6\u6570\u636e\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
Java \u4e2d HashMap \u5982...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203199","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203199","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203199"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203199\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203199"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203199"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203199"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}